County profile · official public datasets

Ellis County, OK

152 public highway bridges tracked in the FHWA National Bridge Inventory: 40.1% rated Good, 59.9% Fair, 0% Poor.

152
Public bridges: 40.1%
Good condition: 0%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Ellis County posts a top-5% lowest Poor-condition share among rated counties in the state across mid-size county bridge inventory.

Top 3%
lowest Poor share in state: 0%
Poor-condition share: 152
public highway bridges: 1975
avg year built

Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.

Ellis County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Ellis County ranks #2 of 77 Oklahoma counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0%). Ellis County, Oklahoma contains 152 public highway bridges. Roughly 40.1% are rated “Good,” 59.9% “Fair,” and 0% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

Total bridges

152

Public highway bridges in Ellis County

Good condition

40.1%

61 of 152 rated 7-9

Fair condition

59.9%

91 of 152 rated 5-6

Poor condition

0 of 152 rated 4 or below

In-state Poor-share rank

#2 of 77

Among Oklahoma counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 152 NBI-tracked bridges by lowest applicable component rating.

Good

40.1% (61)

Fair

59.9% (91)

Poor

0% (0)

44.1% of Ellis County's bridges have passed the 50-year mark

67 of the 152 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 40.1% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.

Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.

1910s

2
1930s

27
1940s

13
1950s

7
1960s

9
1970s

11
1980s

30
1990s

19
2000s

19
2010s

10
2020s

5

What this shows Construction peaked in the 1980s, when 30 of the county's bridges still in the inventory were built, which is 19.7% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1975) matches the Oklahoma average (1977).

How Ellis County compares with Oklahoma's closest counties by inventory size

The 5 Oklahoma counties nearest Ellis County in number of bridges, with their condition splits. Its 0% Poor share is the 2nd-lowest of these 6. Its average build year of 1975 against a peer-group mean of 1976 is in line with the group.

Showing the 5 closest of 76 Oklahoma counties eligible for comparison.

Bridge inventory size and condition shares for Ellis County and the 5 Oklahoma counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Delaware County	160	34.4%	47.5%	18.1%	1975
Haskell County	155	36.8%	56.8%	6.5%	1972
Johnston County	154	40.3%	55.8%	3.9%	1976
Roger Mills County	153	92.2%	7.8%	0%	1982
Ellis County (this page)	152	40.1%	59.9%	0%	1975
Jefferson County	150	46.7%	46%	7.3%	1975

Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Ellis County's. Source: FHWA National Bridge Inventory, 2024 release.

Nationwide counties with similar inventory size or average build year

Two NBI-derived peer sets for Ellis County, both outside Oklahoma so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside OK (152 bridges here).

Logan County, AR · 152 bridges
Kosciusko County, IN · 152 bridges
Muhlenberg County, KY · 152 bridges
Clinton County, MO · 152 bridges

Similar average build year

Nearest mean year-built outside OK (1975 here).

San Bernardino County, CA · avg 1975 · 1,422 bridges
Lane County, OR · avg 1975 · 1,010 bridges
Fulton County, GA · avg 1975 · 775 bridges
Westmoreland County, PA · avg 1975 · 620 bridges

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 152 Good 61 Fair 91 Poor 0

Good-condition bridges (61)

Sort:

Ellis County Bridge Snapshot

Condition distribution

44.1% of Ellis County's bridges have passed the 50-year mark

How Ellis County compares with Oklahoma's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

Good-condition bridges (61)

FAS 2317

2358C

E0480

E0570

E0630

E0590

N1900

2358C

FAS 2317

2324C

2312C

FAS 2303

2356C

FAS 2310

FAS 2310

E0660

E0370

E0350

E0530

2320C

E0440

E0290

E0360

N1810

FAS 2303

N1730

E0430

E0620

E0510

E0640

N1690

U.S. 283

S.H. 15

S.H. 15

S.H. 15

E0460

N1800

N1760

S.H. 15

2302C

N1800

N1710

S.H. 15

S.H. 15

N1780

U.S. 60

E0540

N1730

N1860

U.S. 283

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